J.K. Rowling is the author with the most books made into movies. She is best known for her Harry Potter series, which has been adapted into eight feature films and several spin-off films. The Harry Potter franchise has grossed over $7 billion worldwide, making it one of the highest-grossing media franchises of all time.
In addition to the Harry Potter films, J.K. Rowling’s other works have also been adapted into movies. Her novel Fantastic Beasts and Where to Find Them was adapted into a film in 2016, and its sequel was released in 2018. Her novel The Casual Vacancy was adapted into a miniseries in 2015, and her novel The Tales of Beedle the Bard was adapted into an animated short film in 2017.